Inside Macintosh: Imaging With QuickDraw /

Appendix A - Picture Opcodes

Opcodes in Pictures

Pictures created with the OpenPicture function in a color graphics port use the picture opcodes of the version 2 format. Pictures created with the OpenCPicture function use the opcodes of the extended version 2 format. The inclusion of resolution information in the header differentiates the extended version 2 format from the version 2 picture format. The extended version 2 and version 2 formats share the same opcodes, which are listed in Table A-2. The length of the data that follows each 2-byte opcode is listed in this table.

Pictures created with the OpenPicture function in a basic graphics port use the opcodes of the version 1 format, which are listed in Table A-3 on page A-18.

The unused opcodes found throughout Table A-2 and Table A-3 are reserved for Apple use. If these opcodes are encountered in pictures, they and their reserved data bytes can simply be skipped. By default, QuickDraw reads and then ignores these opcodes. Because opcodes must be word-aligned in version 2 and extended version 2 pictures, a byte of 0 (zero) data is added after odd-size data.

Note

For opcodes $0100-$7FFF, the amount of data for
opcode $nnXX = 2 times nn bytes.

Table A-2Opcodes for extended version 2 and version 2 pictures

Opcode	Name	Description	Size (in bytes) of additional data
$0000	NOP	No operation	0
$0001	Clip	Clipping region	Region size
$0002	BkPat	Background pattern	8
$0003	TxFont	Font number for text (Integer)	2
$0004	TxFace	Text's font style (0..255)	1
$0005	TxMode	Source mode (Integer)	2
$0006	SpExtra	Extra space (Fixed)	4
$0007	PnSize	Pen size (Point)	4
$0008	PnMode	Pen mode (Integer)	2
$0009	PnPat	Pen pattern	8
$000A	FillPat	Fill pattern	8
$000B	OvSize	Oval size (Point)	4
$000C	Origin	dh, dv (Integer)	4
$000D	TxSize	Text size (Integer)	2
$000E	FgColor	Foreground color (Long)	4
$000F	BkColor	Background color (Long)	4
$0010	TxRatio	Numerator (Point), denominator (Point)	8
$0011	VersionOp	Version (0..255)	1
$0012	BkPixPat	Background pixel pattern	Variable; see Listing A-1 on page A-17
$0013	PnPixPat	Pen pixel pattern	Variable; see Listing A-1 on page A-17
$0014	FillPixPat	Fill pixel pattern	Variable; see Listing A-1 on page A-17
$0015	PnLocHFrac	Fractional pen position (Integer--low word of Fixed); if value is not 0.5, pen position is always set to the picture before each text-drawing operation.	2
$0016	ChExtra	Added width for nonspace characters (Integer)	2
$0017	Reserved for Apple use		Not determined
$0018	Reserved for Apple use		Not determined
$0019	Reserved for Apple use		Not determined
$001A	RGBFgCol	Foreground color (RGBColor)	6
$001B	RGBBkCol	Background color (RGBColor)	6
$001C	HiliteMode	Highlight mode flag: no data; this opcode is sent before a drawing operation that uses the highlight mode	0
$001D	HiliteColor	Highlight color (RGBColor)	6
$001E	DefHilite	Use default highlight color; no data; set highlight to default (from low memory)	0
$001F	OpColor	Opcolor (RGBColor)	6
$0020	Line	pnLoc (Point), newPt (Point)	8
$0021	LineFrom	newPt (Point)	4
$0022	ShortLine	pnLoc (Point), dh (-128..127), dv (-128..127)	6
$0023	ShortLineFrom	dh (-128..127), dv (-128..127)	2
$0024	Reserved for Apple use	Data length (Integer), data	2 + data length
$0025	Reserved for Apple use	Data length (Integer), data	2 + data length
$0026	Reserved for Apple use	Data length (Integer), data	2 + data length
$0027	Reserved for Apple use	Data length (Integer), data	2 + data length
$0028	LongText	txLoc (Point), count (0..255), text	5 + text
$0029	DHText	dh (0..255), count (0..255), text	2 + text
$002A	DVText	dv (0..255), count (0..255), text	2 + text
$002B	DHDVText	dh (0..255), dv (0..255), count (0..255), text	3 + text
$002C	fontName	Data length (Integer), old font ID (Integer), name length (0..255), font name[1]	5 + name length
$002D	lineJustify	Operand data length (Integer), intercharacter spacing (Fixed), total extra space for justification (Fixed)[2]	10
$002E	glyphState	Data length (word), followed by these 1-byte Boolean values: outline preferred, preserve glyph, fractional widths, scaling disabled	8
$002F	Reserved for Apple use	Data length (Integer), data	2 + data length
$0030	frameRect	Rectangle (Rect)	8
$0031	paintRect	Rectangle (Rect)	8
$0032	eraseRect	Rectangle (Rect)	8
$0033	invertRect	Rectangle (Rect)	8
$0034	fillRect	Rectangle (Rect)	8
$0035	Reserved for Apple use	8 bytes of data	8
$0036	Reserved for Apple use	8 bytes of data	8
$0037	Reserved for Apple use	8 bytes of data	8
$0038	frameSameRect	Rectangle (Rect)	0
$0039	paintSameRect	Rectangle (Rect)	0
$003A	eraseSameRect	Rectangle (Rect)	0
$003B	invertSameRect	Rectangle (Rect)	0
$003C	fillSameRect	Rectangle (Rect)	0
$003D	Reserved for Apple use		0
$003E	Reserved for Apple use		0
$003F	Reserved for Apple use		0
$0040	frameRRect	Rectangle (Rect)[3]	8
$0041	paintRRect	Rectangle (Rect)[3]	8
$0042	eraseRRect	Rectangle (Rect)[3]	8
$0043	invertRRect	Rectangle (Rect)[3]	8
$0044	fillRRect	Rectangle (Rect)[3]	8
$0045	Reserved for Apple use	8 bytes of data	8
$0046	Reserved for Apple use	8 bytes of data	8
$0047	Reserved for Apple use	8 bytes of data	8
$0048	frameSameRRect	Rectangle (Rect)	0
$0049	paintSameRRect	Rectangle (Rect)	0
$004A	eraseSameRRect	Rectangle (Rect)	0
$004B	invertSameRRect	Rectangle (Rect)	0
$004C	fillSameRRect	Rectangle (Rect)	0
$004D	Reserved for Apple use		0
$004E	Reserved for Apple use		0
$004F	Reserved for Apple use		0
$0050	frameOval	Rectangle (Rect)	8
$0051	paintOval	Rectangle (Rect)	8
$0052	eraseOval	Rectangle (Rect)	8
$0053	invertOval	Rectangle (Rect)	8
$0054	fillOval	Rectangle (Rect)	8
$0055	Reserved for Apple use	8 bytes of data	8
$0056	Reserved for Apple use	8 bytes of data	8
$0057	Reserved for Apple use	8 bytes of data	8
$0058	frameSameOval	Rectangle (Rect)	0
$0059	paintSameOval	Rectangle (Rect)	0
$005A	eraseSameOval	Rectangle (Rect)	0
$005B	invertSameOval	Rectangle (Rect)	0
$005C	fillSameOval	Rectangle (Rect)	0
$005D	Reserved for Apple use		0
$005E	Reserved for Apple use		0
$005F	Reserved for Apple use		0
$0060	frameArc	Rectangle (Rect), startAngle, arcAngle	12
$0061	paintArc	Rectangle (Rect), startAngle, arcAngle	12
$0062	eraseArc	Rectangle (Rect), startAngle, arcAngle	12
$0063	invertArc	Rectangle (Rect), startAngle, arcAngle	12
$0064	fillArc	Rectangle (Rect), startAngle, arcAngle	12
$0065	Reserved for Apple use	12 bytes of data	12
$0066	Reserved for Apple use	12 bytes of data	12
$0067	Reserved for Apple use	12 bytes of data	12
$0068	frameSameArc	Rectangle (Rect)	4
$0069	paintSameArc	Rectangle (Rect)	4
$006A	eraseSameArc	Rectangle (Rect)	4
$006B	invertSameArc	Rectangle (Rect)	4
$006C	fillSameArc	Rectangle (Rect)	4
$006D	Reserved for Apple use	4 bytes of data	4
$006E	Reserved for Apple use	4 bytes of data	4
$006F	Reserved for Apple use	4 bytes of data	4
$0070	framePoly	Polygon (Poly)	Polygon size
$0071	paintPoly	Polygon (Poly)	Polygon size
$0072	erasePoly	Polygon (Poly)	Polygon size
$0073	invertPoly	Polygon (Poly)	Polygon size
$0074	fillPoly	Polygon (Poly)	Polygon size
$0075	Reserved for Apple use	Polygon (Poly)	Polygon size
$0076	Reserved for Apple use	Polygon (Poly)	Polygon size
$0077	Reserved for Apple use	Polygon (Poly)	Polygon size
$0078	frameSamePoly	(Not yet implemented)	0
$0079	paintSamePoly	(Not yet implemented)	0
$007A	eraseSamePoly	(Not yet implemented)	0
$007B	invertSamePoly	(Not yet implemented)	0
$007C	fillSamePoly	(Not yet implemented)	0
$007D	Reserved for Apple use		0
$007E	Reserved for Apple use		0
$007F	Reserved for Apple use		0
$0080	frameRgn	Region (Rgn)	Region size
$0081	paintRgn	Region (Rgn)	Region size
$0082	eraseRgn	Region (Rgn)	Region size
$0083	invertRgn	Region (Rgn)	Region size
$0084	fillRgn	Region (Rgn)	Region size
$0085	Reserved for Apple use	Region (Rgn)	Region size
$0086	Reserved for Apple use	Region (Rgn)	Region size
$0087	Reserved for Apple use	Region (Rgn)	Region size
$0088	frameSameRgn	(Not yet implemented)	0
$0089	paintSameRgn	(Not yet implemented)	0
$008A	eraseSameRgn	(Not yet implemented)	0
$008B	invertSameRgn	(Not yet implemented)	0
$008C	fillSameRgn	(Not yet implemented)	0
$008D	Reserved for Apple use		0
$008E	Reserved for Apple use		0
$008F	Reserved for Apple use		0
$0090	BitsRect	CopyBits with clipped rectangle	Variable[4][5]; see Listing A-2 on page A-17
$0091	BitsRgn	CopyBits with clipped region	Variable[4][5]; see Listing A-3 on page A-18
$0092	Reserved for Apple use	Data length (Integer), data	2 + data length
$0093	Reserved for Apple use	Data length (Integer), data	2 + data length
$0094	Reserved for Apple use	Data length (Integer), data	2 + data length
$0095	Reserved for Apple use	Data length (Integer), data	2 + data length
$0096	Reserved for Apple use	Data length (Integer), data	2 + data length
$0097	Reserved for Apple use	Data length (Integer), data	2 + data length
$0098	PackBitsRect	Packed CopyBits with clipped rectangle	Variable[4]; see Listing A-2 on page A-17
$0099	PackBitsRgn	Packed CopyBits with clipped rectangle	Variable[4]; see Listing A-3 on page A-18
$009A	DirectBitsRect	PixMap, srcRect, dstRect, mode (Integer), PixData	Variable
$009B	DirectBitsRgn	PixMap, srcRect, dstRect, mode (Integer), maskRgn, PixData	Variable
$009C	Reserved for Apple use	Data length (Integer), data	2 + data length
$009D	Reserved for Apple use	Data length (Integer), data	2 + data length
$009E	Reserved for Apple use	Data length (Integer), data	2 + data length
$009F	Reserved for Apple use	Data length (Integer), data	2 + data length
$00A0	ShortComment	Kind (Integer)	2
$00A1	LongComment	Kind (Integer), size (Integer), data	4 + data
$00A2	Reserved for Apple use	Data length (Integer), data	2 + data length
.	.	.	.
.	.	.	.
.	.	.	.
$00AF	Reserved for Apple use	Data length (Integer), data	2 + data length
$00B0	Reserved for Apple use		0
.	.	.	.
.	.	.	.
.	.	.	.
$00CF	Reserved for Apple use		0
$00D0	Reserved for Apple use	Data length (Long), data	4 + data length
.	.	.	.
.	.	.	.
.	.	.	.
$00FE	Reserved for Apple use	Data length (Long), data	4 + data length
$00FF	OpEndPic	End of picture	2
$0100	Reserved for Apple use	2 bytes of data	2
.	.	.	.
.	.	.	.
.	.	.	.
$01FF	Reserved for Apple use	2 bytes of data	2
$0200	Reserved for Apple use	4 bytes of data	4
$02FF	Version	Version number of picture	2
.	.	.	.
.	.	.	.
.	.	.	.
$0BFF	Reserved for Apple use	22 bytes of data	22
$0C00	HeaderOp	For extended version 2: version (Integer), reserved (Integer), hRes, vRes (Fixed), srcRect, reserved (Long); for version 2: opcode	24
$0C01	Reserved for Apple use	24 bytes of data	24
.	.	.	.
.	.	.	.
.	.	.	.
$7F00	Reserved for Apple use	254 bytes of data	254
.	.	.	.
.	.	.	.
.	.	.	.
$7FFF	Reserved for Apple use	254 bytes of data	254
$8000	Reserved for Apple use		0
.	.	.	.
.	.	.	.
.	.	.	.
$80FF	Reserved for Apple use		0
$8100	Reserved for Apple use	Data length (Long), data	4 + data length
.	.	.	.
.	.	.	.
.	.	.	.
$8200	CompressedQuickTime	Data length (Long), data (private to QuickTime)	4 + data length
$8201	UncompressedQuickTime	Data length (Long), data (private to QuickTime)	4 + data length
$FFFF	Reserved for Apple use	Data length (Long), data	4 + data length

Opcodes $009A (DirectBitsRect) and $009B (DirectBitsRgn) define direct-pixel pictures, with pixel maps containing three components that directly specify RGB colors. These opcodes allow your application to cut, paste, and store images with up to 32 bits of color information per pixel.

The DirectBitsRect and DirectBitsRgn opcodes store the baseAddr field of the PixMap record in a version 2 picture. For compatibility with existing systems, the baseAddr field is set to $000000FF. Black-and-white video devices can display pixel maps that are in pictures. On systems without direct-pixel support, opcodes $009A and $009B read a word from the picture and then skip a word of data. The next opcode retrieved from the picture is $00FF, which terminates picture playback. (Note that if you play back a picture on a machine without direct-pixel support, it terminates picture parsing.)

The DirectBitsRect opcode is followed by this structure:

pixMap:     PixMap;   
srcRect:    Rect;    {source rectangle}
dstRect:    Rect;    {destination rectangle}
mode:       Mode;    {transfer mode}
pixData:    

The DirectBitsRgn opcode is followed by this structure:

pixMap:     PixMap;  
srcRect:    Rect;    {source rectangle}
dstRect:    Rect;    {destination rectangle}
mode:       Mode;    {transfer mode}
maskRgn:    Region;  {region for masking}
pixData:    

In a picture, the packType field of a PixMap record specifies the manner in which the pixel data was compressed. To facilitate banding of images when memory is short, all data compression is done on a scan-line basis. The following pseudocode describes the pixel data:

PixData:
IF packType = 1 (unpacked) OR rowbytes < 8 THEN 
   data is unpacked; 
   data size = rowBytes * (bounds.bottom - bounds.top);

IF packType = 2 (drop pad byte) THEN 
   the high-order pad byte of a 32-bit direct pixel is 
   dropped; 
   data size = (3/4) * rowBytes * 
   (bounds.bottom - bounds.top);

IF packType > 2 (packed) THEN 
   image contains (bounds.bottom - bounds.top) packed 
   scan lines;
   each scan line consists of [byteCount] [data];
   IF rowBytes > 250 THEN 
      byteCount is a word
   ELSE 
      it is a byte

Here are the currently defined packing types:

Packing type	Meaning
0	Use default packing
1	Use no packing
2	Remove pad byte--supported only for 32-bit pixels (24-bit data)
3	Run length encoding by pixelSize chunks, one scan line at a time--supported only for 16-bit pixels
4	Run length encoding one component at a time, one scan line at a time, red component first--supported only for 32-bit pixels (24-bit data)

For future compatibility, other packType values skip scan-line data and draw nothing. Since QuickDraw assumes that pixel map data in memory is unpacked regardless of the packType field value, you can use packType to tell the picture-recording mechanism what packing technique to use on that data. A packType value of 0 in memory indicates that the default packing scheme should be used. (Using the default packing scheme is recommended.) Currently, the default packType value for a pixelSize value of 16 is type 3; for a pixelSize value of 32, it is type 4. Regardless of the setting of packType at the time of picture recording, the packType value actually used to save the image is recorded in the picture.

Since each scan line of packed data is preceded by a byte count, packSize is not used and must be 0 for future compatibility.

When the pixel type is direct, cmpCount * cmpSize is less than or equal to pixelSize. For storing 24-bit data in a 32-bit pixel, set cmpSize to 8 and cmpCount to 3. If you set cmpCount to 4, then the high byte is compressed by packing scheme 4 and stored in the picture.

The OpenCPicture function lets your application create a version 2 format picture and include rectangle and resolution information, which is stored in the version 2 picture header. The OpenCPicture function is described in the chapter "Pictures."

The HeaderOp information is passed to the OpenCPicture function as an OpenCPicParams record, which is described in the chapter "Pictures" in this book.

The pseudocode in Listing A-1 illustrates the data for the BkPixPat, PnPixPat, and FillPixPat opcodes.

Listing A-1 Data for the BkPixPat, PnPixPat, and FillPixPat opcodes

IF patType = ditherPat  
THEN
   PatType:    word;       {pattern type = 2}
   Pat1Data:   Pattern;    {old pattern data}
   RGB:        RGBColor;   {desired RGB for pattern}
ELSE 
   PatType:    word;       {pattern type = 1}
   Pat1Data:   Pattern;    {old pattern data}
   PixMap:     PixMap;
   ColorTable: ColorTable;
   PixData:    PixData;    
END;

The pseudocode in Listing A-2 illustrates the data is stored in the BitsRect and PackBitsRect opcodes.

Listing A-2 Data for the BitsRect and PackBitsRect opcodes

   PixMap:     PixMap;     {pixel map}
   ColorTable: ColorTable; {ColorTable record}
   srcRect:    Rect;       {source rectangle}  
   dstRect:    Rect;       {destination rectangle}  
   mode:       Word;       {transfer mode (may include }
                           { new transfer modes)}
   PixData:    PixData;    

The pseudocode in Listing A-3 illustrates the data is stored in the BitsRgn and PackBitsRgn opcodes.

Listing A-3 Data for the BitsRgn and PackBitsRgn opcodes

   pixMap:     PixMap;         
   colorTable: ColorTable;     
   srcRect:    Rect;          {source rectangle} 
   dstRect:    Rect;          {destination rectangle} 
   mode:       Word;          {transfer mode (may }
                              { include new modes)}
   maskRgn:    Rgn;           {region for masking} 
   pixData:    PixData;       

Pictures created with the OpenPicture function in a basic graphics port use the opcodes of the version 1 format, as listed in Table A-3. This size of data that follows each opcode is also listed in this table. Version 1 pictures are limited to 32 KB.

Table A-3 Opcodes for version 1 pictures (Continued)

Opcode	Name	Description	Size (in bytes) of additional data
$00	NOP	No operation	0
$01	ClipRgn	Clipping region	Region size
$02	BkPat	Background pattern	8
$03	TxFont	Font number for text (Integer)	2
$04	TxFace	Text's font style (0..255)	1
$05	TxMode	Source mode (Integer)	2
$06	SpExtra	Extra space (Fixed)	4
$07	PnSize	Pen size (Point)	4
$08	PnMode	Pen mode (Integer)	2
$09	PnPat	Pen pattern	8
$0A	FillPat	Fill pattern	8
$0B	OvSize	Oval size (Point)	4
$0C	Origin	dh (Integer), dv (Integer)	4
$0D	TxSize	Text size (Integer)	2
$0E	FgColor	Foreground color (Long)	4
$0F	BkColor	Background color (Long)	4
$10	TxRatio	Numerator (Point), denominator (Point)	8
$11	picVersion	Version (0..255)	1
$20	Line	pnLoc (Point), newPt (Point)	8
$21	LineFrom	newPt (Point)	4
$22	ShortLine	pnLoc (Point), dh (-128..127), dv (-128..127)	6
$23	ShortLineFrom	dh (-128..127), dv (-128..127)	2
$28	LongText	txLoc (Point), count (0..255), text	5 + text
$29	DHText	dh (0..255), count (0..255), text	2 + text
$2A	DVText	dv (0..255), count (0..255), text	2 + text
$2B	DHDVText	dh (0..255), dv (0..255), count (0..255), text	3 + text
$30	frameRect	Rectangle (Rect)	8
$31	paintRect	Rectangle (Rect)	8
$32	eraseRect	Rectangle (Rect)	8
$33	invertRect	Rectangle (Rect)	8
$34	fillRect	Rectangle (Rect)	8
$38	frameSameRect	Rectangle (Rect)	0
$39	paintSameRect	Rectangle (Rect)	0
$3A	eraseSameRect	Rectangle (Rect)	0
$3B	invertSameRect	Rectangle (Rect)	0
$3C	fillSameRect	Rectangle (Rect)	0
$40	frameRRect	Rectangle (Rect)[6]	8
$41	paintRRect	Rectangle (Rect)	8
$42	eraseRRect	Rectangle (Rect)	8
$43	invertRRect	Rectangle (Rect)	8
$44	fillRRect	Rectangle (Rect)	8
$48	frameSameRRect	Rectangle (Rect)	0
$49	paintSameRRect	Rectangle (Rect)	0
$4A	eraseSameRRect	Rectangle (Rect)	0
$4B	invertSameRRect	Rectangle (Rect)	0
$4C	fillSameRRect	Rectangle (Rect)	0
$50	frameOval	Rectangle (Rect)	8
$51	paintOval	Rectangle (Rect)	8
$52	eraseOval	Rectangle (Rect)	8
$53	invertOval	Rectangle (Rect)	8
$54	fillOval	Rectangle (Rect)	8
$58	frameSameOval	Rectangle (Rect)	0
$59	paintSameOval	Rectangle (Rect)	0
$5A	eraseSameOval	Rectangle (Rect)	0
$5B	invertSameOval	Rectangle (Rect)	0
$5C	fillSameOval	Rectangle (Rect)	0
$60	frameArc	Rectangle (Rect), startAngle, arcAngle	12
$61	paintArc	Rectangle (Rect), startAngle, arcAngle	12
$62	eraseArc	Rectangle (Rect), startAngle, arcAngle	12
$63	invertArc	Rectangle (Rect), startAngle, arcAngle	12
$64	fillArc	Rectangle (Rect), startAngle, arcAngle	12
$68	frameSameArc	Rectangle (Rect)	4
$69	paintSameArc	Rectangle (Rect)	4
$6A	eraseSameArc	Rectangle (Rect)	4
$6B	invertSameArc	Rectangle (Rect)	4
$6C	fillSameArc	Rectangle (Rect)	4
$70	framePoly	Polygon (Poly)	Polygon size
$71	paintPoly	Polygon (Poly)	Polygon size
$72	erasePoly	Polygon (Poly)	Polygon size
$73	invertPoly	Polygon (Poly)	Polygon size
$74	fillPoly	Polygon (Poly)	Polygon size
$78	frameSamePoly	(Not yet implemented)	0
$79	paintSamePoly	(Not yet implemented)	0
$7A	eraseSamePoly	(Not yet implemented)	0
$7B	invertSamePoly	(Not yet implemented)	0
$7C	fillSamePoly	(Not yet implemented)	0
$80	frameRgn	Region (Rgn)	Region size
$81	paintRgn	Region (Rgn)	Region size
$82	eraseRgn	Region (Rgn)	Region size
$83	invertRgn	Region (Rgn)	Region size
$84	fillRgn	Region (Rgn)	Region size
$88	frameSameRgn	(Not yet implemented)	0
$89	paintSameRgn	(Not yet implemented)	0
$8A	eraseSameRgn	(Not yet implemented)	0
$8B	invertSameRgn	(Not yet implemented)	0
$8C	fillSameRgn	(Not yet implemented)	0
$90	BitsRect	CopyBits with clipped rectangle	Variable[7][8]; see Listing A-2 on page A-17
$91	BitsRgn	CopyBits with clipped region	Variable[7][8]; see Listing A-3 on page A-18
$98	PackBitsRect	Packed CopyBits with clipped rectangle	Variable[7]; see Listing A-2 on page A-17
$99	PackBitsRgn	Packed CopyBits with clipped rectangle	Variable[7]; see Listing A-3 on page A-18
$A0	ShortComment	Kind (Integer)	2
$A1	LongComment	Kind (Integer), size (Integer), data	4 + data
$FF	EndOfPicture	End of picture	0

---

[1] The font name information begins with a word containing the field's data length, followed by a word containing the old font ID, a byte containing the length of the font name, and then the font name itself.

You can extract font names, IDs, and other information from a picture by using the routines described in the chapter "Pictures" in this book.

---

[2] For opcode $002D (lineJustify), the line justification information contains the line-layout state of the Script Manager so that it can be restored when the picture is played back. It begins with a word containing the field's data length, which should always be 8 bytes. The operands are two fixed-point values, describing the Script Manager's extra character width value and the total extra width that was added to the style run (each StdText call) to perform justification.

For example, if the intercharacter spacing were 1 pixel and the total extra width added were 10 pixels, the following hexadecimal bytes would be generated for the picture:

2D 00 08 00 01 00 00 00 0A 00 00

In this example, the $002D opcode is followed by the length word, 00 08, and then the integer part of the intercharacter spacing, 00 01, its fractional part, 00 00, and then the integer part of the total extra spacing, 00 0A, and its fractional part, 00 00.

---

[3] For opcodes $0040-$0044: rounded rectangles use the setting of the OvSize point (refer to opcode $000B).

---

[4] Four opcodes ($0090, $0091, $0098, $0099) are modifications of version 1 opcodes. The first word following the opcode is rowBytes. If the high bit of rowBytes is set, then it is a pixel map containing multiple bits per pixel; if it is not set, it is a bitmap containing 1 bit per pixel. In general, the difference between version 2 and version 1 formats is that the pixel map replaces the bitmap, a color table has been added, and pixData replaces bitData.

---

[5] For opcodes $0090 (BitsRect) and $0091 (BitsRgn), the data is unpacked. These opcodes can be used only when rowBytes is less than 8.

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[6] For opcodes $40-$44: rounded rectangles use the setting of the OvSize point (refer to
opcode $0B).

---

[7] In general, the difference between version 2 and version 1 formats is that the pixel map replaces the bitmap, a color table has been added, and pixData replaces bitData.

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[8] For opcodes $90 (BitsRect) and $91 (BitsRgn), the data is unpacked. These opcodes can only be used when rowBytes is less than 8.